论文部分内容阅读
地球化学样、单矿物及一些岩石样品常需分析微量铊,其含量有时小于10~(-5) ％。测定这样微量的铊尚无很好的方法。石墨炉原子吸收法灵敏度高,适于微量铊的测定,但已有方法都使用有机溶剂萃取分离,效果差。用泡沫塑料吸附方法作为一种分离富集手段,能解脱制备为水性溶液,很适合于石墨炉原子吸收分析,目前,已应用于测金、砷及稀土等。本文就聚氨醋泡沫塑料富集分离微量铊进行了研究,在含适量卤素离子(Br~-、Cl~-或F~-)的稀
Geochemical samples, single minerals and some rock samples often need to analyze trace amounts of thallium, its content is sometimes less than 10 ~ (-5)%. There is no good way to measure this trace of thallium. Graphite furnace atomic absorption spectrometry for high sensitivity, suitable for the determination of trace amounts of thallium, but the methods have been used organic solvent extraction and separation, poor results. With the foam adsorption method as a means of separation and enrichment, can be prepared as an aqueous solution of liberation, it is suitable for graphite furnace atomic absorption spectrometry, at present, has been used in gold, arsenic and rare earth. In this paper, we studied the enrichment and separation of trace amounts of thallium in polyurethane foam. When dilute thallium with appropriate amount of halogen ions (Br ~ -, Cl ~ - or F ~ -)